mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-17 06:04:43 -04:00
105dcd005b
In preparation for multiple scheduler support, introduce scx_prog_sched() accessor which returns the scx_sched instance associated with a BPF program. The association is determined via the special KF_IMPLICIT_ARGS kfunc parameter, which provides access to bpf_prog_aux. This aux can be used to retrieve the struct_ops (sched_ext_ops) that the program is associated with, and from there, the corresponding scx_sched instance. For compatibility, when ops.sub_attach is not implemented (older schedulers without sub-scheduler support), unassociated programs fall back to scx_root. A warning is logged once per scheduler for such programs. As scx_root is still the only scheduler, this shouldn't introduce user-visible behavior changes. Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Andrea Righi <arighi@nvidia.com>